Share buy-back

30 July 2008 - HELLENIC EXCHANGES S.A. HOLDING, CLEARING, SETTLEMENT AND REGISTRY (the Company) informs investors that, based on §4 article 4 of the European Commission Regulation 2273/2003, and in implementation of the resolution of the Annual General Meeting of shareholders of the Company of 14.5.2008, it purchased own shares, as follows:

·      On 30.7.2008 46,084 own shares were purchased, at an average price of €9.00 per share, and total transaction cost of €414,624.32

Share buy-backs are taking place through the members of Athens Exchange Alpha Finance, Agricultural Bank of Greece Securities, Eurobank Securities and Midas Securities.

Following the abovementioned purchases, the Company owns 1,466,453 own shares (2.08% of the total 70,485,563 shares outstanding).